One hurdle will have to be overcome: Unicode. The "standard" characters produced by a QB64 program doesn't have enough Greek symbols, only those considered good enough for mathematics. Otherwise have to make do with letters that look enough alike such as "H" and "n" for Greek "eta" but might not be acceptable. Irritatingly, "sigma" seems to be the only one having both its states although not the "s-like" one usually used at the words ending in "os".
I don't know if one of you who is Greek would like reading his/her native language in symbols like this. This goes for Russian and other languages having other writing systems. Otherwise, it would have to be solved with something stronger than the somewhat broken "_MAPUNICODE" implementation.
If only the QB64 IDE and compiler messages are desired in a language other than English, then it might require something like the "gettext" library with "PO" file support. I don't know much about that, I'm only speaking out of looking at some "MIME" type files having short messages written out in different languages. Note that the BASIC keywords and built-in function names would always have to be in English -- this comes from the inventors of the programming language.
I don't know if one of you who is Greek would like reading his/her native language in symbols like this. This goes for Russian and other languages having other writing systems. Otherwise, it would have to be solved with something stronger than the somewhat broken "_MAPUNICODE" implementation.
If only the QB64 IDE and compiler messages are desired in a language other than English, then it might require something like the "gettext" library with "PO" file support. I don't know much about that, I'm only speaking out of looking at some "MIME" type files having short messages written out in different languages. Note that the BASIC keywords and built-in function names would always have to be in English -- this comes from the inventors of the programming language.